How Much Does a Mobile App Backend Cost on AWS, Azure, or GCP?
A mobile app backend costs $200-$300/mo at 1,000 users and $3,500-$4,000/mo at 100,000 users across AWS, Azure, and GCP. Push notifications, authentication, and object storage for uploads add up alongside the core API and database.
Your mobile app's backend is where the real cloud costs live — API servers, databases, push notifications, file storage, and authentication. These costs scale directly with your user base. Use our calculator to compare what your mobile app backend would cost across AWS, Azure, and GCP at different user volumes.
Mobile Backend Architecture Components
A production mobile app backend requires API servers (REST or GraphQL) for handling client requests, a database for user data and app state, object storage for user-uploaded images and videos, push notification services, authentication (OAuth, social login), and real-time capabilities (WebSockets or server-sent events) for chat or live updates. At scale, you add message queues for async processing and a CDN for media delivery.
BaaS vs Custom Backend: Cost Trade-offs
Backend-as-a-Service options like Firebase, Supabase, or AWS Amplify simplify development but can get expensive at scale. Firebase's Blaze plan charges per-read/write operation, which adds up quickly for data-heavy apps. A custom backend on cloud infrastructure gives you predictable costs and full control. The break-even point is typically around 50K monthly active users — below that, BaaS is cheaper; above it, custom backends save money.
Cost Scaling for Mobile Apps
At 1K MAU, a mobile backend costs $200–$300/month across providers (a single small VM + managed database handles the load). At 10K MAU, expect $1,500–$1,600/month as you add Kubernetes, caching, and object storage. At 100K MAU, costs jump to $3,500–$4,000/month with larger databases, CDN, and NoSQL. At 1M MAU, infrastructure costs range from $11,000–$13,000/month and architecture choices have massive cost implications.
Key Cost Factors
- Compute: API servers handling mobile client requests
- Database: User data, app state, and analytics storage
- Object storage: User photos, videos, and file uploads
- Push notifications: FCM/APNs delivery infrastructure
- Authentication: Identity management and token services
- CDN: Media delivery and API edge caching
- Real-time: WebSocket connections for live features
Frequently Asked Questions
How much does a mobile app backend cost on AWS vs Azure vs GCP?
At 1K MAU, a mobile backend costs $200-$300/month across providers with a single small VM and managed database. At 10K MAU, expect $1,500-$1,600/month as you add Kubernetes, caching, and object storage. At 100K MAU, costs jump to $3,500-$4,000/month, and at 1M MAU expect $11,000-$13,000/month. Provider choice matters less than architecture decisions like BaaS vs custom backend at this stage.
Is Firebase or a custom cloud backend cheaper for a mobile app?
Backend-as-a-Service options like Firebase, Supabase, or AWS Amplify are cheaper and faster below roughly 50K monthly active users. Above that threshold, Firebase's per-read/write pricing on the Blaze plan tends to get expensive for data-heavy apps, and a custom backend on cloud infrastructure gives more predictable costs and full control. The break-even point depends heavily on how data-intensive your app is.
What drives the cost of a mobile app backend?
API servers handling client requests and the database storing user data and app state are the foundation cost. Object storage for photos and videos, push notification infrastructure for FCM/APNs, and authentication services add up as user count grows. Apps with chat or live features also pay for WebSocket connections, which scale with concurrent users rather than total registered users.
How accurate are these mobile backend cost estimates?
Estimates use published on-demand list prices for AWS, Azure, and GCP in US regions, assuming 730 hours per month, last verified 2026-07-15. They exclude BaaS platform fees (Firebase, Supabase) since those are priced per-operation rather than per-instance. Real bills vary with reserved capacity and how much traffic hits caching versus origin — see /methodology.